OPA380
OPA2380
SBOS291E − NOVEMBER 2003 − REVISED NOVEMBER 2004
Precision, High-Speed
Transimpedance Amplifier
FEATURES
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
> 1MHz TRANSIMPEDANCE BANDWIDTH
EXCELLENT LONG-TERM V
OS
STABILITY
BIAS CURRENT: 50pA (max)
OFFSET VOLTAGE: 25µV (max)
INPUT CURRENT RANGE: 10nA to 1mA
DRIFT: 0.1µV/°C (max)
GAIN BANDWIDTH: 90MHz
QUIESCENT CURRENT: 6.5mA
SUPPLY RANGE: 2.7V to 5.5V
SINGLE AND DUAL VERSIONS
MicroSize
PACKAGE: MSOP-8
DESCRIPTION
The OPA380 family of transimpedance amplifiers provides
high-speed (90MHz Gain Bandwidth [GBW]) operation, with
extremely high precision, excellent long-term stability, and
very low 1/f noise. It is ideally suited for high-speed
photodiode applications. The OPA380 features an offset
voltage of 25µV, offset drift of 0.1µV/°C, and bias current of
50pA. The OPA380 far exceeds the offset, drift, and noise
performance that conventional JFET op amps provide.
The signal bandwidth of a transimpedance amplifier depends
largely on the GBW of the amplifier and the parasitic
capacitance of the photodiode, as well as the feedback
resistor. The 90MHz GBW of the OPA380 enables a trans-
impedance bandwidth of > 1MHz in most configurations. The
OPA380 is ideally suited for fast control loops for power level
on an optical fiber.
As a result of the high precision and low-noise characteristics
of the OPA380, a dynamic range of 5 decades can be
achieved. This capability allows the measurement of signal
currents in the order of 10nA, and up to 1mA in a single I/V
conversion stage. In contrast to logarithmic amplifiers, the
OPA380 provides very wide bandwidth throughout the full
dynamic range. By using an external pulldown resistor to
–5V, the output voltage range can be extended to include 0V.
The OPA380 (single) is available in MSOP-8 and SO-8
packages. The OPA2380 (dual) is available in the
miniature MSOP-8 package. They are specified from
–40°C to +125°C.
APPLICATIONS
PHOTODIODE MONITORING
PRECISION I/V CONVERSION
OPTICAL AMPLIFIERS
CAT-SCANNER FRONT-END
R
F
+5V
7
2
OPA380
6
V
OUT
(0V to 4.4V)
Photodiode
1MΩ
67pF
−5V
100kΩ
3
75pF
R
P
(Optional
Pulldown
Resistor)
OPA380 RELATED DEVICES
PRODUCT
OPA300
OPA350
OPA335
OPA132
OPA656/7
LOG112
LOG114
IVC102
DDC112
FEATURES
150MHz CMOS, 2.7V to 5.5V Supply
500µV VOS, 38MHz, 2.5V to 5V Supply
10µV VOS, Zero-Drift, 2.5V to 5V Supply
16MHz GBW, Precision FET Op Amp,
±15V
230MHz, Precision FET,
±5V
LOG amp, 7.5 decades,
±4.5V
to
±18V
Supply
LOG amp, 7.5 decades,
±2.25V
to
±5.5V
Supply
Precision Switched Integrator
Dual Current Input, 20-Bit ADC
4
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2003-2004, Texas Instruments Incorporated
www.ti.com
OPA380
OPA2380
SBOS291E − NOVEMBER 2003 − REVISED NOVEMBER 2004
www.ti.com
ABSOLUTE MAXIMUM RATINGS
(1)
Voltage Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7V
Signal Input Terminals(2), Voltage . . . . . . . . . . −0.5V to (V+) + 0.5V
Current . . . . . . . . . . . . . . . . . . . . .
±10mA
(3) . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Short-Circuit Current
Operating Temperature Range . . . . . . . . . . . . . . . −40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Lead Temperature (soldering, 10s) . . . . . . . . . . . . . . . . . . . . . +300°C
ESD Rating (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . 2000V
(1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only, and
functional operation of the device at these or any other conditions
beyond those specified is not implied.
(2) Input terminals are diode clamped to the power-supply rails. Input
signals that can swing more than 0.5V beyond the supply rails
should be current limited to 10mA or less.
(3) Short-circuit to ground; one amplifier per package.
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to observe
proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
(1)
PRODUCT
OPA380
OPA380
OPA2380
PACKAGE-LEAD
MSOP-8
SO-8
MSOP-8
PACKAGE
MARKING
AUN
OPA380A
BBX
(1) For the most current package and ordering information, see the
Package Option Addendum located at the end of this data sheet.
PIN ASSIGNMENTS
Top View
OPA380
NC
(1)
−
In
+In
V
−
OPA2380
8
7
6
5
NC
(1)
V+
Out
NC
(1)
1
2
3
4
MSOP− SO−
8,
8
Out A
−
In A
1
2
3
4
MSOP−
8
8
7
6
5
V+
Out B
−
In B
+In A
V
−
+In B
NOTES: (1) NC indicates no internal connection.
2
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OPA380
OPA2380
SBOS291E − NOVEMBER 2003 − REVISED NOVEMBER 2004
ELECTRICAL CHARACTERISTICS: OPA380 (SINGLE), V
S
= 2.7V to 5.5V
Boldface
limits apply over the temperature range,
T
A
= −40°C to +125°C.
All specifications at TA = +25°C, RL = 2kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
OPA380
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
Drift
vs Power Supply
Over Temperature
Long-Term Stability(1)
Channel Separation, dc
INPUT BIAS CURRENT
Input Bias Current
Over Temperature
Input Offset Current
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 10kHz
Input Voltage Noise Density, f > 1MHz
Input Current Noise Density, f = 10kHz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
INPUT IMPEDANCE
Differential Capacitance
Common-Mode Resistance and Inverting Input
Capacitance
OPEN-LOOP GAIN
Open-Loop Voltage Gain
VOS
dVOS/dT
PSRR
VS = +5V, VCM = 0V
VS = +2.7V to +5.5V, VCM = 0V
VS = +2.7V to +5.5V, VCM = 0V
4
0.03
2.4
See Note (1)
1
25
0.1
10
10
µV
µV/°C
µV/V
µV/V
µV/V
pA
pA
µ
V
PP
nV/√Hz
nV/√Hz
fA/√Hz
IB
IOS
en
en
en
in
VCM
CMRR
VCM = VS/2
VCM = VS/2
VS = +5V, VCM = 0V
VS = +5V, VCM = 0V
VS = +5V, VCM = 0V
VS = +5V, VCM = 0V
V−
100
3
±50
Typical Characteristics
6
±100
3
67
5.8
10
(V+) − 1.8V
110
1.1
1013 || 3
(V−) < VCM < (V+) – 1.8V
V
dB
pF
Ω
|| pF
AOL
0.1V < VO < (V+) − 0.7V, VS = 5V, VCM = VS/2
0.1V < VO < (V+) − 0.6V, VS = 5V, VCM = VS/2,
TA = -40°C to +85°C
0V < VO < (V+) − 0.7V, VS = 5V, VCM = 0V,
RP = 2kΩ to −5V(2)
0V < VO < (V+) − 0.6V, VS = 5V, VCM = 0V,
RP = 2kΩ to −5V(2), TA = -40°C to +85°C
CL = 50pF
110
110
106
106
130
130
120
120
dB
dB
dB
dB
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
Settling Time, 0.01%(3)
Overload Recovery Time(4)(5)
OUTPUT
Voltage Output Swing from Positive Rail
Voltage Output Swing from Negative Rail
Voltage Output Swing from Positive Rail
Voltage Output Swing from Negative Rail
Output Current
Short-Circuit Current
Capacitive Load Drive
Open-Loop Output Impedance
POWER SUPPLY
Specified Voltage Range
Quiescent Current
Over Temperature
TEMPERATURE RANGE
Specified and Operating Range
Storage Range
Thermal Resistance
MSOP-8, SO-8
GBW
SR
tS
G = +1
VS = +5V, 4V Step, G = +1
VIN
•
G = > VS
RL = 2kΩ
RL = 2kΩ
RP = 2kΩ to −5V(2)
RP = 2kΩ to −5V(2)
90
80
2
100
400
600
60
100
400
600
−20
0
See Typical Characteristics
150
See Typical Characteristics
40
2.7
5.5
8.3
8.8
+125
+150
150
MHz
V/µs
µs
ns
mV
mV
mV
mV
mA
Ω
V
mA
mA
°C
°C
°C/W
IOUT
ISC
CLOAD
RO
VS
IQ
f = 1MHz, IO = 0A
IO = 0A
6.5
−40
−65
q
JA
(1) 300-hour life test at 150°C demonstrated randomly distributed variation approximately equal to measurement repeatability of 1µV.
(2) Tested with output connected only to R , a pulldown resistor connected between V
P
OUT and −5V, as shown in Figure 5. See also applications section,
Achieving
Output Swing to Ground.
(3) Transimpedance frequency of 1MHz.
(4) Time required to return to linear operation.
(5) From positive rail.
3
OPA380
OPA2380
SBOS291E − NOVEMBER 2003 − REVISED NOVEMBER 2004
www.ti.com
ELECTRICAL CHARACTERISTICS: OPA2380 (DUAL), V
S
= 2.7V to 5.5V
Boldface
limits apply over the temperature range,
T
A
= −40°C to +125°C.
All specifications at TA = +25°C, RL = 2kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
OPA2380
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
Drift
vs Power Supply
Over Temperature
Long-Term Stability(1)
Channel Separation, dc
INPUT BIAS CURRENT
Input Bias Current, Inverting Input
Noninverting Input
Over Temperature
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 10kHz
Input Voltage Noise Density, f > 1MHz
Input Current Noise Density, f = 10kHz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
INPUT IMPEDANCE
Differential Capacitance
Common-Mode Resistance and Inverting Input
Capacitance
OPEN-LOOP GAIN
Open-Loop Voltage Gain
VOS
dVOS/dT
PSRR
VS = +5V, VCM = 0V
VS = +2.7V to +5.5V, VCM = 0V
VS = +2.7V to +5.5V, VCM = 0V
4
0.03
2.4
See Note (1)
1
25
0.1
10
10
µV
µV/°C
µV/V
µV/V
µV/V
pA
pA
IB
IB
VCM = VS/2
VCM = VS/2
3
±50
3
±200
Typical Characteristics
3
67
5.8
10
V−
95
(V+) − 1.8V
105
1.1
1013 || 3
en
en
en
in
VCM
CMRR
VS = +5V, VCM = 0V
VS = +5V, VCM = 0V
VS = +5V, VCM = 0V
VS = +5V, VCM = 0V
µ
V
PP
nV/√Hz
nV/√Hz
fA/√Hz
V
dB
pF
Ω
|| pF
(V−) < VCM < (V+) – 1.8V
AOL
0.12V < VO < (V+) − 0.7V, VS = 5V, VCM = VS/2
0.12V < VO < (V+) − 0.6V, VS = 5V, VCM = VS/2,
TA = -40°C to +85°C
0V < VO < (V+) − 0.7V, VS = 5V, VCM = 0V,
RP = 2kΩ to −5V(2)
0V < VO < (V+) − 0.6V, VS = 5V, VCM = 0V,
RP = 2kΩ to −5V(2), TA = -40°C to +85°C
CL = 50pF
110
110
106
106
130
130
120
120
dB
dB
dB
dB
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
Settling Time, 0.01%(3)
Overload Recovery Time(4), (5)
OUTPUT
Voltage Output Swing from Positive Rail
Voltage Output Swing from Negative Rail
Voltage Output Swing from Positive Rail
Voltage Output Swing from Negative Rail
Output Current
Short-Circuit Current
Capacitive Load Drive
Open-Loop Output Impedance
POWER SUPPLY
Specified Voltage Range
Quiescent Current (per amplifier)
Over Temperature
TEMPERATURE RANGE
Specified and Operating Range
Storage Range
Thermal Resistance
MSOP-8
GBW
SR
tS
G = +1
VS = +5V, 4V Step, G = +1
VIN
•
G = > VS
RL = 2kΩ
RL = 2kΩ
RP = 2kΩ to −5V(2)
RP = 2kΩ to −5V(2)
90
80
2
100
400
600
80
120
400
600
−20
0
See Typical Characteristics
150
See Typical Characteristics
40
2.7
5.5
9.5
10
+125
+150
150
MHz
V/µs
µs
ns
mV
mV
mV
mV
mA
Ω
V
mA
mA
°C
°C
°C/W
IOUT
ISC
CLOAD
RO
VS
IQ
f = 1MHz, IO = 0A
IO = 0A
7.5
−40
−65
q
JA
(1) 300-hour life test at 150°C demonstrated randomly distributed variation approximately equal to measurement repeatability of 1µV.
(2) Tested with output connected only to R , a pulldown resistor connected between V
P
OUT and −5V, as shown in Figure 5. See also applications section,
Achieving
Output Swing to Ground.
(3) Transimpedance frequency of 1MHz.
(4) Time required to return to linear operation.
(5) From positive rail.
4
www.ti.com
OPA380
OPA2380
SBOS291E − NOVEMBER 2003 − REVISED NOVEMBER 2004
TYPICAL CHARACTERISTICS: V
S
= +2.7V to +5.5V
All specifications at TA = +25°C, RL = 2kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
OPEN−LOOP GAIN AND PHASE vs FREQUENCY
140
120
Open−
Loop Gain (dB)
100
80
60
40
20
0
−20
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
Phase
Gain
90
45
PSRR, CMRR (dB)
0
Phase (_)
−
45
−
90
−135
−180
−225
−270
100M
160
140
120
100
80
POWER−SUPPLY REJECTION RATIO AND
COMMON−MODE REJECTION vs FREQUENCY
PSRR
60
40
20
0
−20
0.1
1
10
100
1k
10k
Frequency (Hz)
CMRR
100k
1M
10M 100M
INPUT VOLTAGE NOISE SPECTRAL DENSITY
1000
Input Voltage Noise (nV/√(Hz)
8
7
Quiescent Current (mA)
6
5
4
3
2
1
1
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
0
QUIESCENT CURRENT vs TEMPERATURE
100
V
S
= +5.5V
V
S
= +2.7V
10
−40 −25
0
25
50
75
100
125
Temperature (_ C)
QUIESCENT CURRENT vs SUPPLY VOLTAGE
7
6
Quiescent Current (mA)
5
4
3
2
1
0
2.7
3.0
3.5
4.0
4.5
5.0
5.5
Supply Voltage (V)
1
Input Bias Current (pA)
100
1000
INPUT BIAS CURRENT vs TEMPERATURE
10
−40 −25
0
25
50
75
100
125
Temperature (_C)
5
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